Multipartite entanglement in the quantum tetrahedron
The study investigates multipartite entanglement using an 'entropic fill' measure for four-qubit systems represented as quantum tetrahedra (intertwiners). Findings show that average entanglement is highest in arbitrary tensors and lower in intertwiners, especially for large spin values. The entropic fill is well-defined for four-qudit states, linking geometric properties of the tetrahedron to quantum information measures.